农产品品质备受关注, 而由品质变化引发的农产品安全事故频繁, 开发农产品品质的快速无损检测技术成为研究热点。太赫兹波(THz)是介于微波与红外之间的电磁辐射, 由于其独特的优势, 具有重要的科学研究价值。近年来, 随着THz辐射源和探测器研究的不断突破, 大大丰富了THz的应用研究。与其他检测技术相比, 作为一种新型检测技术, THz辐射具有安全和高信噪比等重要特征, 能获得传统检测方法无法获得的物理、 化学和生物等信息, 在质量安全检测与控制、 生物医学和通信等领域的应用前景广阔。首先介绍了THz波的概念和主要性质, 接着对THz技术在农产品品质检测应用上的研究进展进行综述, 分析THz探测技术存在的问题, 对THz技术的应用潜力进行展望, 最后提出THz技术在储粮品质检测中新的应用和广阔前景。

With recent development of THz sources and detector, applications of THz radiation to nondestructive testing and quality control have expanded in many fields, such as agriculture, safety inspection and quality control, medicine, biochemistry, communication etc. Compared with other detection technique, being a new kind of technique, THz radiation has low energy, good perspectivity, and high signal-to-noise ratio, and thus can obtain physical, chemical and biological information. This paper first introduces the basic concept of THz radiation and the major properties, then gives an extensive review of recent research progress in detection of the quality of agricultural products via THz technique, analyzes the existing shortcomings of THz detection and discusses the outlook of potential application, finally proposes the new application of THz technique to detection of quality of stored grain.